Bug 453239

Confirmed on a fresh 22.04 installation.
Bombs immediately, even 'kstars --version'.  Probably won't help due to missing debug symbols but here is the backtrace.

Thread 1 "kstars" received signal SIGSEGV, Segmentation fault.
0x00007ffff529927e in ?? () from /lib/x86_64-linux-gnu/libQt5Core.so.5
(gdb) bt
#0  0x00007ffff529927e in ?? () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#1  0x00007ffff563c046 in QGuiApplication::screenAdded(QScreen*) () from /lib/x86_64-linux-gnu/libQt5Gui.so.5
#2  0x00007ffff56217c0 in QWindowSystemInterface::handleScreenAdded(QPlatformScreen*, bool) ()
   from /lib/x86_64-linux-gnu/libQt5Gui.so.5
#3  0x00007fffef8f0528 in QXcbConnection::initializeScreens() () from /lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#4  0x00007fffef8c7680 in QXcbConnection::QXcbConnection(QXcbNativeInterface*, bool, unsigned int, char const*) ()
   from /lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#5  0x00007fffef8cadb0 in QXcbIntegration::QXcbIntegration(QStringList const&, int&, char**) ()
   from /lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#6  0x00007ffff7fb7523 in ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqxcb.so
#7  0x00007ffff56405ef in QGuiApplicationPrivate::createPlatformIntegration() () from /lib/x86_64-linux-gnu/libQt5Gui.so.5
#8  0x00007ffff5641c08 in QGuiApplicationPrivate::createEventDispatcher() () from /lib/x86_64-linux-gnu/libQt5Gui.so.5
#9  0x00007ffff5268b07 in QCoreApplicationPrivate::init() () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007ffff5644b70 in QGuiApplicationPrivate::init() () from /lib/x86_64-linux-gnu/libQt5Gui.so.5
#11 0x00007ffff5d58ced in QApplicationPrivate::init() () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#12 0x0000555555716b6c in ?? ()
#13 0x00007ffff47efd90 in __libc_start_call_main (main=main@entry=0x555555716b00, argc=argc@entry=1, 
    argv=argv@entry=0x7fffffffe208) at ../sysdeps/nptl/libc_start_call_main.h:58
#14 0x00007ffff47efe40 in __libc_start_main_impl (main=0x555555716b00, argc=1, argv=0x7fffffffe208, init=<optimized out>, 
    fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffffffe1f8) at ../csu/libc-start.c:392
#15 0x0000555555762785 in ?? ()

Thread 1 "kstars" received signal SIGSEGV, Segmentation fault.
doActivate<false> (sender=0x0, signal_index=9, argv=0x7fffffffd550) at kernel/qobject.cpp:3768
3768    kernel/qobject.cpp: No such file or directory.
(gdb) bt
#0  doActivate<false> (sender=0x0, signal_index=9, argv=0x7fffffffd550) at kernel/qobject.cpp:3768
#1  0x00007ffff529ba97 in QMetaObject::activate (sender=<optimised out>, m=m@entry=0x7ffff5bd50e0 <QGuiApplication::staticMetaObject>, local_signal_index=local_signal_index@entry=1, argv=argv@entry=0x7fffffffd550)
    at kernel/qobject.cpp:3946
#2  0x00007ffff5645046 in QGuiApplication::screenAdded (this=<optimised out>, _t1=<optimised out>, _t1@entry=0x55555654fa50) at .moc/moc_qguiapplication.cpp:389
#3  0x00007ffff562a7c0 in QWindowSystemInterface::handleScreenAdded (ps=ps@entry=0x5555564ca590, isPrimary=<optimised out>) at kernel/qwindowsysteminterface.cpp:826
#4  0x00007fffef903528 in QXcbConnection::initializeScreens (this=this@entry=0x5555564b5ad0) at ./src/plugins/platforms/xcb/qxcbconnection_screens.cpp:413
#5  0x00007fffef8da680 in QXcbConnection::QXcbConnection (this=0x5555564b5ad0, nativeInterface=<optimised out>, canGrabServer=<optimised out>, defaultVisualId=<optimised out>, displayName=<optimised out>)
    at ./src/plugins/platforms/xcb/qxcbconnection.cpp:103
#6  0x00007fffef8dddb0 in QXcbIntegration::QXcbIntegration (this=this@entry=0x5555564b17d0, parameters=..., argc=@0x7fffffffdbec: 1, argv=argv@entry=0x7fffffffdf68) at ./src/plugins/platforms/xcb/qxcbintegration.cpp:197
#7  0x00007ffff7fb7523 in QXcbIntegrationPlugin::create (this=<optimised out>, system=..., argv=0x7fffffffdf68, argc=@0x7fffffffdbec: 1, parameters=...) at ./src/plugins/platforms/xcb/qxcbmain.cpp:56
#8  QXcbIntegrationPlugin::create (this=<optimised out>, system=..., parameters=..., argc=@0x7fffffffdbec: 1, argv=0x7fffffffdf68) at ./src/plugins/platforms/xcb/qxcbmain.cpp:53
#9  0x00007ffff56495ef in init_platform (argv=<optimised out>, argc=@0x7fffffffdbec: 1, platformThemeName=..., platformPluginPath=..., pluginNamesWithArguments=...) at kernel/qguiapplication.cpp:1223
#10 QGuiApplicationPrivate::createPlatformIntegration (this=0x5555564a6a50) at kernel/qguiapplication.cpp:1481
#11 0x00007ffff564ac08 in QGuiApplicationPrivate::createEventDispatcher (this=<optimised out>) at kernel/qguiapplication.cpp:1498
#12 0x00007ffff5271b07 in QCoreApplicationPrivate::init (this=this@entry=0x5555564a6a50) at kernel/qcoreapplication.cpp:835
#13 0x00007ffff564db70 in QGuiApplicationPrivate::init (this=0x5555564a6a50) at kernel/qguiapplication.cpp:1527
#14 0x00007ffff5d61ced in QApplicationPrivate::init() () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#15 0x0000555555716b6c in main (argc=<optimised out>, argv=0x7fffffffdf68) at ./kstars/main.cpp:67

Crash without backports PPa also

Please test the build of kstars found in :

https://launchpad.net/~ci-train-ppa-service/+archive/ubuntu/4837

(In reply to Rik Mills from comment #4)
> Please test the build of kstars found in :
> 
> https://launchpad.net/~ci-train-ppa-service/+archive/ubuntu/4837

Yeap, works fine.  Thanks!

FYI, seems kstars did not like having LTO enabled on the build

https://wiki.ubuntu.com/ToolChain/LTO

Tracking bug for fixing this in Ubuntu:

https://bugs.launchpad.net/ubuntu/+source/kstars/+bug/1971091

I added the PPA in a couple machines (Kubuntu and Lubuntu 22.04).  That fixed the problem.

Best Regards.

The fixed package should be landing imminently in regular Ubuntu updates, so no need for PPA packages once it does.